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Description:
unix single instance
Unix Single Instance #
Restrict a Linux or Mac OS X app to only be able to open one instance at a time. (Currently per user)
This uses Unix sockets to ensure a single instance. There are other ways of doing this however this was
the most "portable." For windows support cosnider adding: windows_single_instance
Installing #
Add the async modifier to your apps main function.
Write a function cmdProcessor(List<dynamic> decodedArgs) which re-processes command line options
Add a call to unixSingleInstance() inside the appropriate conditions. Placement in the main function
to taste.
Notes #
If using flutter, recommend using this with the: window_manager plugin
Future expansion #
Currently it is on a per-user basis and ignores multiple displays. It could be greatly improved with
options which allow you to toggle if it's per X, per user, etc. (If per X and per user and for linux only
consider using dbus -- not a strong recommendation.)
Example #
import 'package:unix_single_instance/unix_single_instance.dart';
void main(List<String> args) async {
WidgetsFlutterBinding.ensureInitialized();
if (Platform.isLinux) {
if (!await unixSingleInstance(arguments, cmdProcessor)) {
exit(0);
return;
}
} else if (Platform.isMacOS) {
if (!await unixSingleInstance(arguments, cmdProcessor)) {
exit(0);
return;
}
}
runApp(const MyApp());
}
void cmdProcessor(List<dynamic> decodedArgs) {
if (decodedArgs.isEmpty && !Platform.isWindows) {
windowManager.waitUntilReadyToShow(null, () async {
await windowManager.show();
await windowManager.focus();
});
}
for (var each in decodedArgs) {
if (each is! String) {
continue;
}
doSomethingWithThis(each);
}
}
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License
For personal and professional use. You cannot resell or redistribute these repositories in their original state.
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